diff --git a/pyproject.toml b/pyproject.toml
index 0fdff3d..0168830 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,6 +7,7 @@ dependencies = [
     "atproto",
     "python-dotenv",
     "PyYAML",
+    "requests",
 ]
 
 [project.scripts]
diff --git a/src/void_tools/cli.py b/src/void_tools/cli.py
index 7f906d3..1373e05 100644
--- a/src/void_tools/cli.py
+++ b/src/void_tools/cli.py
@@ -7,9 +7,39 @@ import os
 import json
 import yaml
 import hashlib
+import requests
 from atproto import models
 from void_tools.client import get_client
 
+def mirror_to_letta(text, target_uri):
+    """Mirrors an annotation to Letta archival memory."""
+    agent_id = os.getenv("AGENT_ID")
+    api_key = os.getenv("LETTA_API_KEY")
+    
+    if not agent_id or not api_key:
+        print("  Skipping Letta sync: AGENT_ID or LETTA_API_KEY missing from .env")
+        return
+        
+    try:
+        url = f"https://api.letta.com/v1/agents/{agent_id}/archival-memory"
+        headers = {
+            "Authorization": f"Bearer {api_key}",
+            "Content-Type": "application/json"
+        }
+        payload = {
+            "text": f"Margin Annotation attached to {target_uri}: {text}"
+        }
+        
+        # We need to handle Letta's expected JSON payload which might require a specific format.
+        # The standard endpoint takes {"text": "string"}
+        resp = requests.post(url, headers=headers, json=payload)
+        if resp.ok:
+            print("  Mirrored annotation to Letta archival memory.")
+        else:
+            print(f"  Warning: Failed to mirror to Letta: {resp.status_code} - {resp.text}")
+    except Exception as e:
+        print(f"  Warning: Failed to mirror to Letta: {e}")
+
 def cmd_sync(args):
     client = get_client()
     agent_id = os.getenv("AGENT_ID", "agent-c52e371d-cb89-4f99-8634-b606bdc69cad")
@@ -251,6 +281,8 @@ def cmd_dispatch(args):
                     'record': record
                 })
                 print(f"  Annotated: {resp.uri}")
+                # Mirror to internal memory
+                mirror_to_letta(text, target_uri)
             except Exception as e:
                 print(f"Error annotating {target_uri}: {e}")
                 
@@ -432,6 +464,8 @@ def cmd_annotate(args):
             'record': record
         })
         print(f"Successfully annotated: {resp.uri}")
+        # Mirror to internal memory
+        mirror_to_letta(args.text, target_uri)
     except Exception as e:
         print(f"Error annotating {target_uri}: {e}", file=sys.stderr)
         sys.exit(1)